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- Title
3-Methyl and N-Methyl-substitution in heptanuclear complexes effects multistability investigated by Mössbauer spectroscopy.
- Authors
Renz, F.; Martinez, V.; Klein, M.
- Abstract
The precursors [Fe(III)(N − R − L)Cl] (N − R − LH2 = N, N ′ -bis(2’-hydroxy-3’- methyl-benzyliden)-1,7-diamino-4-R-4-azaheptane, R = H, methyl(Me)) are high-spin ( S = 5/2) complexes. The Lewis-acidic precursors are combined with Lewis-Base-bridging-units [ M(CN) x ] y − ( M = Fe(II), Ru(II), Co(III)) to form heptanuclear star-shaped [ M{CN–Fe(III)(N − R − L)} x ]Cl y molecular switches. The starshaped compounds are high-spin systems at room temperature. On cooling to 20 K some of the compounds exhibit multistability, i.e. several iron(III) centers within a molecule switch the spin state as shown by Mössbauer spectroscopy.
- Subjects
LINEAR algebra; SPECTRUM analysis; QUALITATIVE chemical analysis; LINE geometry; MATHEMATICAL complexes
- Publication
Hyperfine Interactions, 2008, Vol 184, Issue 1-3, p251
- ISSN
0304-3843
- Publication type
Article
- DOI
10.1007/s10751-008-9798-2